# Nebula - Knowledge Center — Make your notes alive

> Personal knowledge system for notes, materials, and tasks with rich editing and sync. (iPhone/iPad app by 栩 罗.)

- Source: https://appshunter.io/ios/app/nebula-knowledge-center/id1501111134 (this page in markdown: same URL + `.md`)
- Developer: [栩 罗](https://appshunter.io/developer/401887415)
- Category: Productivity, Lifestyle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 29 MB
- Languages: English, Chinese
- Released: 2020-04-23
- Data updated: 2026-06-10
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/nebula-knowledge-center/id1501111134/reviews.md

## What is Nebula?

Nebula is a personal knowledge system, combines note-taking, material management, and task management together.

* Rich text editor
- Paragraphs can be folded.
- You can drag and drop to add link and attachments into the editor
- You can paste your image into the editor
- Text decorations like Bold, underscore, italic, strikethrough, hi-lightly.
- Plenty of attachments: image, video, audio, location, freehand sketch.
- Paragraphs can have subparagraphs, easier to organize the contents.
- Link List, checkbox, quote block, source code block.
- Publish to blog platforms with attachments.
- Export to other file formats, such as Markdown, txt, html, pdf, image.
- Add tags to paragraph.
- Add working status to paragraphs.
- Add priority to paragraph.
- Insert date and time.
- Full-screen mode.
- Works with Task Management and Material Management to make everything easy and efficient.

* Task Agenda 
- Automatically generate tasks from marks in agenda, no more effort to manage the work.
- Automatically list high priority tasks.
- Group tasks according to date, arrange the work more wisely.
- Show overdue tasks automatically, in case you forget.
- Set repetable tasks, and notify you in the agenda periodically.

* Automatically Kanban
- Automatically generate all items from document headings.
- Automatically update note content from Kanban, and another way around.
- Support drag gestures on Mac and iPad.

* Capture and Materials management
- Capture text, image, audio, video, link from other apps.
- Use those materials in your document anytime, anywhere.
- Material management center.

* Task Management
- Track any paragraph by setting status to it.
- Add date and time to arrange the task.
- Set priority
- Agenda to gather and manage all tasks. 

* Bi-direction document linking
- Create document link, and generate bi-direction link automatically
- Paragraph level link

* Document management
- Hierarchy-based document system.
- Apply multiple tags to paragraphs.
- Status, date, and time can also be used to find your content.
- Documents, event paragraphs in it can be moved around easily.
- Full-text search.
- Mark your favorite document, find them directly.

* iCloud sync
Automatically sync to your iCloud account, keep your data safe, and keep all devices the same.

* Publish to blog platforms
We support directly publish articles to blog platforms, if the platform we have now didn't contain the one you are using, please let us know.

And we can publish attachments too!

* Export to other formats
- HTML, text, image, PDF, Markdown.

For more information about Nebula please visit http://forum.nebulaapp.net

Privacy policy: https://forum.nebulaapp.net/t/32
Terms of service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Twitter: @nebulaapp1

## Key features

- Rich text editor with attachments
- Task management and agenda
- Kanban board for item management
- Material capture and organization
- Bi-directional document linking
- iCloud sync across devices
- Export to multiple formats

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Nebula membership by month | $1.49 | per month |
| Nebula membership yearly | $13.49 | per year |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/nebula-knowledge-center/id1501111134/reviews.md

### 2/5 — Messy

*2021-05-15, version 1.3.4*

So much potential that still needs to be realised. The font is tiny and there's no way to customise it. The icons are tiny and very light and there's no way to make them bigger. I can't modify the theme - not too keen on the colour of the tabs. I keep trying to capture ideas and they disappear into nothingness. Tried to read help section but images are not registering on the server - there's just a blank square with a question mark. It's very difficult to figure out how to do things. There is not list of extra features to know what you're getting if you subscribe. I did subscribe for a month and I don't know what I'm getting. Was hoping it would be obvious, but it isn't. Not renewing and deleting app from computer. It's a nice app wth lots of potential. I may consider once developer catches up with a working standard

### 2/5 — App has many bugs - Almost unusable

*2021-04-28*

I write this on April 28, 2021.

The app looked promising, and I did the mistake of unlocking all the features, and paying for it.

Unfortunately the developer has to fix many bugs that crash the app almost constantly. I have hope he will fix it.

As of now adding images to capture in the app crashes it, the agenda does not do anything, the custom Kanban status crashes it.

Please work on it, I have hope it can be useful, but it needs a lot more testing to be really usable.

**Developer response:** Hi, please take a look at the new version 1.34 to see if those crash still there

Thanks

—— 

Hi Joseph,  

Really sorry for causing the problem, I noticed you are on macOS, could you please provide your mac’s model, we will try the best to fix any bug reported, and thank you very much for the support, I feel sorry for the unpleasant experience, fix will be released asap, in the mean while, it will be extremely helpful that if you give us some more info on those bugs, there is a build in feedback button on the top left corner to put mort text, once we located the source of the crashing you met, a new fix will be released. 

Sincerely

### 4/5 — Rather impressive

*2020-09-22, version 1.2.3*

For an app that's attempting to do so much, x3note works remarkably well, even at this early stage. What's more, the app's footprint is gratifyingly tiny – once installed, it only takes up a few megabytes on disk (14 MB), which is extraordinary. I have noticed a few bugs while using the app, but the developer is quick to remove them.

The closest rival is NotePlan, which, while powerful, is significantly more expensive. And x3note's support for "ideas" (meaning a raft of attachments/copied-and-pasted input from multiple sources) is unique. The agenda feature is nice, but personally I'm especially impressed by the notetaking support, which is as powerful as most outliners (e.g. Workflowy, Dynalist).

So far, I like it very much. I've deducted a star for the occasional bugs, but will be very happy to reinstate it once the app has matured a little further.

### 5/5 — Great start

*2020-08-18*

Unique in the notes category.

## Frequently asked questions about Nebula

### What is Nebula?

Nebula is a personal knowledge system that integrates note-taking, material management, and task management. It offers a rich text editor, task agenda, Kanban boards, and iCloud sync to help users organize their information efficiently.

### What devices does Nebula support?

Nebula is available on Mac, iPhone, iPad, and iPod. It utilizes iCloud sync to keep your data consistent across all your Apple devices.

### Can I export my notes from Nebula?

Yes, Nebula allows you to export your content in various formats including Markdown, TXT, HTML, PDF, and image files. This makes it easy to share or back up your information.

### How does Nebula handle tasks?

Nebula features a Task Agenda that automatically generates tasks from marks within your notes. It also lists high-priority and overdue tasks, and supports repeatable tasks with notifications.

### Does Nebula have ads?

Nebula is ad-free, allowing for an uninterrupted user experience. The app's monetization comes from optional subscription plans.

### What are the subscription options for Nebula?

Nebula offers a monthly membership for $1.49/month and a yearly membership for $13.49/year. These subscriptions provide access to premium features and enhanced functionality.

### How often is Nebula updated?

The latest version of Nebula is 1.3.6, which was last updated on August 17, 2021. While specific update frequency isn't detailed, the app has seen regular development since its release on April 23, 2020.

### Is Nebula suitable for collaboration?

While Nebula is primarily a personal knowledge system, its ability to publish to blog platforms and export to various formats can facilitate sharing of information. Direct real-time collaboration features are not explicitly mentioned.

## Version history (last 5 releases)

### 1.3.6 — 2021-08-17

New features:
New Agenda, much easier to manage the task status, tags, priority.
Material manage now includ all attachments.

Improvements:
Fix when renaming document, didn't correctly rename those opening documents.
Improved opening speed.
In editor now high light the current line.
Fix when update task status, not update in agenda and kanban.
Improve interaction with image attachment in editor.
Fix cursor location misplaced when paste text.
Fix selection range can't adjust in iPhone and iPad.
Fix some customized settings didn't load in time after sync.

### 1.3.5 — 2021-05-18

New features
1. macOS and iPad has better layout for windows

Fix
1. Fix crash when try to add customized status
2. Faster to open and close document
3. The paragraph button now shows at correct place

### 1.3.4 — 2021-05-13

New features
1. Now you can drag and drop link and attachment into editor
2. Now you can use filter in selector
3. In document info, you can see and chooose documents on the document path
4. You can directly paste image into the editor now

Fix
1. Editor performance is enhanced greatly
2. Fix some backlink didn't correctly searched
3. Removed a library that causes crashs

### 1.3.3 — 2021-04-14

New feature
1. New kanban function
2. Support tabs on iPhone
3. New material UI
4. Integrate favorite into document browser
5. New full screen mode
6. Now even if you change your document name, paragraph heading, won't affect link and back link
7. Now document title is in document, and can change directly
 
fix and optimization
1. Optimize highlight text render
2. Fix material won't auto refresh shared item, need tap refresh button 
3. Fix sometimes it will fail to move an item in material management to document
4. Fix attachment in document too easy to tap
5. Fix after change document name, the search result didn't change

### 1.3.2 — 2021-03-15

1. fix a broken link to the forum
2. fix a potential crash

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## More apps by 栩 罗

- [Costgram - Money tracker](https://appshunter.io/ios/app/costgram-money-tracker/id1055665728)

All apps by 栩 罗: https://appshunter.io/developer/401887415

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*